MetaSetup connects ports 80,443 and 6379. Last mentioned port is a messaging server hosted in our cloud. Ports 80 and 443 are http and https ports which are common. Under some circumstances your antivirus or firewall software might warn you about 6379, this port will be used to listen to messages coming towards MetaSetup. We do not send any kind of personal information through used ports. Please allow connections to all those ports if your securiy software pops up. Usually you can whitelist applications or ports.
MetaInstaller does not use 6379, your clients use 80,443 ports which should not be problematic with any kind of security software.